牵引电机轴承预紧量对外圈滚道应力的影响

摘要

In view of the small-area stripping phenomenon in the outer surface of the outer ring of the non-drive end bearing of locomotive motor, this paper analyzed the stress distribution of the bearing in the working condition by virtue of the ANSYS software. The complex stress environment of the bearing was converted into a static load, and the maximum Mises von stress of the outer ring of the outer race under different preloads was calculated. From the calculation results, it is found that the stress concentration exists in the outer race of the bearing, and the stress in the bottom position of the roller path is similar to that of the pulsating cyclic stress. By analyzing the corresponding maximum stress with respect to different preloads, the conclusion that the bearing's radial preload has a great influence on the stress value of the outer ring of the bearing is obtained. The same type of bearing preload control in an appropriate and smaller range can improve the bearing life.%根据机车电机非端轴承外圈滚道面出现小面积剥离的现象,利用ANSYS软件分析该轴承在工作状况下的应力分布.将轴承工作过程中的复杂受力环境折算成静载荷,分别计算不同预紧量下外圈滚道最大von mises应力.从计算结果中发现,轴承外圈滚道存在应力集中的现象,滚道最下端位置的受力近似于脉动循环应力.通过分析不同预紧量对应的最大应力,最后得出轴承径向预紧量对轴承外圈滚道应力值存在较大影响的结论.将同一型号轴承预紧量控制在一个适当、较小范围内能提高轴承使用寿命.